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Stock-Based Compensation (Tables)
9 Months Ended
Sep. 30, 2018
Stock-Based Compensation  
Summary of Stock-Based Compensation Expense Recognized

The following table presents stock-based compensation expense recognized for stock options, restricted stock units, or RSUs, performance-based restricted stock units, or PRSUs, and the Company’s employee stock purchase program, or ESPP, in the Company’s statements of operations (in thousands):

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Three Months Ended

 

Nine Months Ended

 

 

 

September 30, 

 

September 30, 

 

 

    

2018

    

2017

    

2018

    

2017

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Research and development

 

$

880

 

$

916

 

$

2,770

 

$

3,361

 

General and administrative

 

 

1,068

 

 

1,186

 

 

4,206

 

 

3,640

 

Total

 

$

1,948

 

$

2,102

 

$

6,976

 

$

7,001